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Portfolio Loans - Summary of Recorded Investment by Category for Portfolio Loans Restructured and Subsequently Defaulted (Details) - Non-Covered Loans $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) loan | Dec. 31, 2017 USD ($) loan
Schedule of Financing Receivables, Troubled Debt Restructurings - Suibsequent Defaults [Line Items] |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loan | 0 | 3
Recorded Balance | $ | $ 0 | $ 348
Commercial and industrial |  |
Schedule of Financing Receivables, Troubled Debt Restructurings - Suibsequent Defaults [Line Items] |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loan | 0 | 2
Recorded Balance | $ | $ 0 | $ 343
Residential Portfolio Segment [Member] |  |
Schedule of Financing Receivables, Troubled Debt Restructurings - Suibsequent Defaults [Line Items] |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loan | 0 | 1
Recorded Balance | $ | $ 0 | $ 5

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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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